# -*- coding:utf-8 -*-
def add(a, b):
    print("ADDING %d + %d" % (a, b))
    return a+b

def subtract(a, b):
    print("SUBTRACTING %d - %d" % (a, b))
    return a-b

def multiply(a, b):
    print("MULTIPLYING %d * %d" % (a, b))
    return a*b

def divide(a, b):
    print("DIVIDING %d / %d" % (a, b))
    return a/b

print("Let's do some math with just functions!")

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print("Age: %d, Height: %d, Weight: %d, IQ: %d" % (age, height, weight, iq))

print("Here is a puzzle.")
what = add(age, subtract(height, multiply(weight, divide(iq, 2))))

print("That becomes: ", what, "Can you do it by hand?")